from django.db import models
from django.utils import timezone

from django.utils import timezone
import datetime
class Question(models.Model):
    question_text = models.CharField(max_length=200)
    pub_date = models.DateTimeField('发布时间')
    def __str__(self):
        return self.question_text

    def was_published_recently(self):
        now = timezone.now()
        return now - datetime.timedelta(days=1) <= self.pub_date <= now

    was_published_recently.admin_order_field = 'pub_date'
    was_published_recently.short_description = '是否最近发布？'
    was_published_recently.boolean = True
    def is_new(self):
        return self.pub_date >= timezone.now() + datetime.timedelta(hours=-1)



class Choice(models.Model):
    question = models.ForeignKey(Question, on_delete=models.CASCADE)
    choice_text = models.CharField(max_length=200)
    votes = models.IntegerField(default=0)